/* ========================================
   ToolFlow — Global Styles
   Modern, vibrant, premium design
   ======================================== */

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #f0f4ff;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-text: #0f172a;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-accent-light: #eef2ff;
  --color-accent-bg: #e0e7ff;
  --color-accent-glow: rgba(99,102,241,0.25);
  --color-success: #10b981;
  --color-success-bg: #ecfdf5;
  --color-error: #ef4444;
  --color-error-bg: #fef2f2;
  --color-warning: #f59e0b;
  --color-warning-bg: #fffbeb;
  --gradient-hero: linear-gradient(135deg, #6366f1 0%, #8b5cf6 30%, #a78bfa 60%, #c084fc 100%);
  --gradient-hero-mesh: radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.15) 0%, transparent 50%),
                        radial-gradient(ellipse at 80% 20%, rgba(168,85,247,0.12) 0%, transparent 50%),
                        radial-gradient(ellipse at 40% 80%, rgba(59,130,246,0.1) 0%, transparent 50%);
  --gradient-card: linear-gradient(135deg, rgba(99,102,241,0.03) 0%, rgba(168,85,247,0.03) 100%);
  --gradient-accent: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-cool: linear-gradient(135deg, #06b6d4, #3b82f6);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.06), 0 2px 4px -2px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 40px -10px rgba(0,0,0,0.1), 0 8px 16px -8px rgba(0,0,0,0.06);
  --shadow-glow: 0 0 30px rgba(99,102,241,0.15);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
  --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --max-width: 1200px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }

img { max-width: 100%; display: block; }

/* Typography */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; color: var(--color-text); }
h1 { font-size: 2.5rem; letter-spacing: -0.03em; }
h2 { font-size: 1.875rem; letter-spacing: -0.025em; }
h3 { font-size: 1.375rem; letter-spacing: -0.015em; }
h4 { font-size: 1.125rem; }

p { color: var(--color-text-secondary); }

/* Container */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; width: 100%; }

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 var(--color-accent-glow); }
  50% { box-shadow: 0 0 20px 4px var(--color-accent-glow); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out both;
}

/* ========== HEADER ========== */
.site-header {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(226,232,240,0.6);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--color-text);
  transition: all var(--transition);
}

.logo svg { width: 32px; height: 32px; filter: drop-shadow(0 2px 4px rgba(99,102,241,0.3)); transition: transform var(--transition); }
.logo:hover { color: var(--color-accent); }
.logo:hover svg { transform: scale(1.08) rotate(-3deg); }

.nav-links { display: flex; align-items: center; gap: 0.375rem; list-style: none; }
.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.nav-links a:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.625rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.mobile-menu-btn:hover { background: var(--color-accent-light); color: var(--color-accent); }

.mobile-nav {
  display: none;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem 1rem;
  animation: slideDown 0.3s ease;
}

.mobile-nav.active { display: block; }
.mobile-nav a {
  display: block;
  padding: 0.75rem 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  margin-bottom: 0.125rem;
}
.mobile-nav a:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* ========== FOOTER ========== */
.site-footer {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: #cbd5e1;
  margin-top: auto;
  padding: 4rem 0 2rem;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p { font-size: 0.875rem; margin-top: 1rem; color: #94a3b8; line-height: 1.7; }
.footer-col h4 {
  color: #fff;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.75rem;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}
.footer-col a {
  display: block;
  color: #94a3b8;
  font-size: 0.875rem;
  padding: 0.3rem 0;
  transition: all var(--transition);
}
.footer-col a:hover { color: #fff; transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid rgba(148,163,184,0.15);
  padding-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: #64748b;
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
  line-height: 1.5;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn:hover::after { opacity: 1; }

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.35);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.btn-success { background: linear-gradient(135deg, #10b981, #059669); color: #fff; box-shadow: 0 2px 8px rgba(16,185,129,0.3); }
.btn-success:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(16,185,129,0.35); }

.btn-danger { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; box-shadow: 0 2px 8px rgba(239,68,68,0.3); }
.btn-danger:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(239,68,68,0.35); }

.btn-ghost { background: transparent; color: var(--color-text-secondary); }
.btn-ghost:hover { background: var(--color-accent-light); color: var(--color-accent); }
.btn-ghost::after { display: none; }

.btn-sm { padding: 0.4rem 0.875rem; font-size: 0.8rem; }
.btn-lg { padding: 0.9rem 2rem; font-size: 1rem; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.btn-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* ========== CARDS ========== */
.card {
  background: var(--color-surface);
  border: 1px solid rgba(226,232,240,0.8);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(99,102,241,0.2);
  transform: translateY(-4px);
}

.card:hover::before { opacity: 1; }

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  text-decoration: none;
  color: inherit;
}

.tool-card .tool-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
  transition: all var(--transition-bounce);
  position: relative;
}

.card:hover .tool-icon {
  transform: scale(1.1) rotate(-3deg);
}

.tool-card h3 { font-size: 1.05rem; font-weight: 700; transition: color var(--transition); }
.card:hover .tool-card h3,
.tool-card:hover h3 { color: var(--color-accent); }
.tool-card p { font-size: 0.875rem; color: var(--color-text-secondary); margin: 0; line-height: 1.6; }

.tool-card .card-arrow {
  margin-top: auto;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  transform: translateX(-8px);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.card:hover .card-arrow,
.tool-card:hover .card-arrow { opacity: 1; transform: translateX(0); }

/* Icon colors by category — enhanced */
.icon-seo { background: linear-gradient(135deg, #fef3c7, #fde68a); color: #d97706; box-shadow: 0 4px 12px rgba(217,119,6,0.12); }
.icon-text { background: linear-gradient(135deg, #dbeafe, #bfdbfe); color: #2563eb; box-shadow: 0 4px 12px rgba(37,99,235,0.12); }
.icon-dev { background: linear-gradient(135deg, #e0e7ff, #c7d2fe); color: #4f46e5; box-shadow: 0 4px 12px rgba(79,70,229,0.12); }
.icon-image { background: linear-gradient(135deg, #fce7f3, #fbcfe8); color: #db2777; box-shadow: 0 4px 12px rgba(219,39,119,0.12); }
.icon-generator { background: linear-gradient(135deg, #d1fae5, #a7f3d0); color: #059669; box-shadow: 0 4px 12px rgba(5,150,105,0.12); }
.icon-converter { background: linear-gradient(135deg, #f3e8ff, #e9d5ff); color: #7c3aed; box-shadow: 0 4px 12px rgba(124,58,237,0.12); }

/* ========== TOOL PAGE LAYOUT ========== */
.tool-hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 3rem 0;
  position: relative;
}

.tool-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero-mesh);
  pointer-events: none;
}

.tool-hero h1 { margin-bottom: 0.75rem; position: relative; }
.tool-hero .tool-description { font-size: 1.1rem; color: var(--color-text-secondary); max-width: 600px; position: relative; line-height: 1.7; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  margin-bottom: 1.25rem;
  color: var(--color-text-muted);
  position: relative;
}
.breadcrumb a { color: var(--color-text-muted); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { color: var(--color-border); }

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, rgba(16,185,129,0.08), rgba(5,150,105,0.08));
  color: var(--color-success);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid rgba(16,185,129,0.15);
  position: relative;
}

.tool-main { padding: 3rem 0; }

.tool-interface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition);
}
.tool-interface:focus-within {
  box-shadow: var(--shadow-lg), 0 0 0 3px var(--color-accent-bg);
}

/* Input & Output zones */
.io-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

.io-zone label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

textarea, input[type="text"], input[type="number"], input[type="url"], input[type="email"], select {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  outline: none;
}

textarea:focus, input[type="text"]:focus, input[type="number"]:focus, input[type="url"]:focus, select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-bg);
  background: #fff;
}

textarea {
  min-height: 180px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
}

.output-area {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.8rem 1rem;
  min-height: 180px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-all;
  overflow-y: auto;
  max-height: 400px;
}

/* Action bar */
.action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-light);
  flex-wrap: wrap;
}

/* Examples */
.examples-section { margin-top: 1.5rem; }
.examples-section h4 { font-size: 0.85rem; color: var(--color-text-secondary); margin-bottom: 0.75rem; }
.example-chips { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.example-chip {
  padding: 0.4rem 1rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
}
.example-chip:hover {
  background: var(--color-accent-bg);
  border-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(99,102,241,0.15);
}

/* ========== SECTIONS ========== */
.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }
.section-alt {
  background: var(--color-surface);
  position: relative;
}
.section-alt::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero-mesh);
  pointer-events: none;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}
.section-header h2 {
  position: relative;
  display: inline-block;
}
.section-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: 4px;
  margin: 0.75rem auto 0;
}
.section-header p {
  margin-top: 1rem;
  font-size: 1.1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* Grids */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }

/* ========== HERO ========== */
.hero {
  background: var(--gradient-hero);
  padding: 6rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Decorative blobs in hero */
.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  top: -200px;
  right: -100px;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  bottom: -150px;
  left: -100px;
  animation: float 10s ease-in-out infinite reverse;
}

.hero .container { position: relative; z-index: 2; }

.hero h1 {
  font-size: 3.25rem;
  letter-spacing: -0.04em;
  max-width: 750px;
  margin: 0 auto;
  color: #fff;
  text-shadow: 0 2px 10px rgba(0,0,0,0.1);
  animation: fadeInUp 0.6s ease-out both;
}
.hero p {
  font-size: 1.2rem;
  margin-top: 1.25rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  color: rgba(255,255,255,0.88);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.15s both;
}

.hero .search-box {
  max-width: 520px;
  margin: 2.5rem auto 0;
  position: relative;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero .search-box input {
  padding: 1rem 1.25rem 1rem 3rem;
  border-radius: 100px;
  font-size: 1rem;
  border: 2px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #fff;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  transition: all var(--transition);
}

.hero .search-box input::placeholder { color: rgba(255,255,255,0.6); }

.hero .search-box input:focus {
  border-color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.22);
  box-shadow: 0 8px 40px rgba(0,0,0,0.12), 0 0 0 4px rgba(255,255,255,0.1);
}

.hero .search-icon {
  position: absolute;
  left: 1.125rem;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.6);
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.45s both;
}

.hero-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.9);
  font-weight: 500;
  background: rgba(255,255,255,0.1);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  transition: all var(--transition);
}
.hero-badge:hover {
  background: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}
.hero-badge svg { color: rgba(255,255,255,0.9); }

/* ========== FAQ ========== */
.faq-list { max-width: 720px; margin: 0 auto; }

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  overflow: hidden;
  background: var(--color-surface);
  transition: all var(--transition);
}

.faq-item:hover { border-color: rgba(99,102,241,0.3); box-shadow: var(--shadow-sm); }
.faq-item.active { border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent-bg); }

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  font-family: var(--font-sans);
  padding: 1.25rem 1.5rem;
  transition: color var(--transition);
}
.faq-item.active .faq-question { color: var(--color-accent); }

.faq-question .faq-icon {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 1.25rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-accent-light);
}
.faq-item.active .faq-icon { transform: rotate(45deg); background: var(--color-accent); color: #fff; }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  padding: 0 1.5rem;
}

.faq-item.active .faq-answer { max-height: 500px; padding: 0 1.5rem 1.25rem; }

/* ========== RELATED TOOLS ========== */
.related-tools { padding: 4rem 0; }
.related-tools h2 { margin-bottom: 2rem; }

/* ========== CATEGORY HERO ========== */
.category-hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 3.5rem 0;
  position: relative;
}
.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero-mesh);
  pointer-events: none;
}
.category-hero h1 { margin-bottom: 0.75rem; position: relative; }
.category-hero p { font-size: 1.1rem; max-width: 600px; position: relative; }

/* ========== TRUST STRIP ========== */
.trust-strip {
  padding: 3.5rem 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.trust-items {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition);
}
.trust-item:hover { transform: translateY(-2px); }

.trust-item .trust-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.25rem;
  transition: all var(--transition-bounce);
  box-shadow: 0 4px 12px rgba(99,102,241,0.1);
}
.trust-item:hover .trust-icon { transform: scale(1.1) rotate(-5deg); }

/* ========== TOAST ========== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-xl);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  max-width: 380px;
  backdrop-filter: blur(8px);
}

.toast-success { background: linear-gradient(135deg, #10b981, #059669); color: #fff; }
.toast-error { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; }
.toast-info { background: var(--gradient-accent); color: #fff; }

@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideOut { from { transform: translateX(0); opacity: 1; } to { transform: translateX(100%); opacity: 0; } }

/* ========== STATS ROW ========== */
.stats-row {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.stat-item {
  text-align: center;
  padding: 1rem 1.5rem;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-accent-bg);
}
.stat-value { font-size: 1.5rem; font-weight: 800; color: var(--color-accent); background: var(--gradient-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.8rem; color: var(--color-text-muted); font-weight: 500; }

/* ========== FILE DROP ========== */
.file-drop {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: linear-gradient(135deg, rgba(99,102,241,0.02), rgba(168,85,247,0.02));
}

.file-drop:hover, .file-drop.dragover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  box-shadow: 0 0 0 4px var(--color-accent-bg);
}

.file-drop .drop-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.file-drop p { font-size: 0.95rem; color: var(--color-text-secondary); font-weight: 500; }
.file-drop .drop-hint { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 0.5rem; }

/* ========== TOGGLE/TABS ========== */
.tab-group {
  display: flex;
  gap: 0;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  width: fit-content;
  margin-bottom: 1rem;
  background: var(--color-bg);
}

.tab-btn {
  padding: 0.6rem 1.5rem;
  background: transparent;
  border: none;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text-secondary);
  font-family: var(--font-sans);
  transition: all var(--transition);
  position: relative;
}
.tab-btn.active {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}
.tab-btn:hover:not(.active) { background: rgba(99,102,241,0.05); color: var(--color-accent); }

/* ========== RANGE SLIDER ========== */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  background: linear-gradient(to right, var(--color-accent-bg), var(--color-accent-bg));
  border-radius: 100px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient-accent);
  cursor: pointer;
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(99,102,241,0.3);
  transition: transform var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }

/* ========== COLOR SWATCH ========== */
.color-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  cursor: pointer;
  position: relative;
  transition: all var(--transition-bounce);
  box-shadow: var(--shadow-sm);
}
.color-swatch:hover { transform: scale(1.08); box-shadow: var(--shadow-lg); }
.color-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  margin-top: 0.375rem;
  text-align: center;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ========== PREVIEW IMAGE ========== */
.preview-container {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.preview-box {
  flex: 1;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.preview-box img { max-width: 100%; max-height: 300px; object-fit: contain; }

/* ========== SEARCH RESULTS DROPDOWN ========== */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  margin-top: 0.5rem;
  max-height: 300px;
  overflow-y: auto;
  z-index: 50;
  border: 1px solid var(--color-border);
}

.search-results a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--color-text);
  transition: all var(--transition);
  font-size: 0.9rem;
}
.search-results a:hover { background: var(--color-accent-light); color: var(--color-accent); }

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  .hero h1 { font-size: 2.25rem; }
  .hero { padding: 4rem 0 3.5rem; }
  .hero p { font-size: 1.05rem; }
  .section { padding: 3.5rem 0; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .io-grid { grid-template-columns: 1fr; }
  .tool-interface { padding: 1.25rem; border-radius: var(--radius-lg); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .trust-items { gap: 1.5rem; }
  .action-bar { flex-direction: column; align-items: stretch; }
  .btn-group { justify-content: stretch; }
  .btn-group .btn { flex: 1; justify-content: center; }
  .preview-container { flex-direction: column; }
  .hero-badges { gap: 0.75rem; }
  .hero-badge { font-size: 0.8rem; padding: 0.4rem 0.75rem; }
  .card { padding: 1.25rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.875rem; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .container { padding: 0 1rem; }
  .hero-badges { flex-direction: column; align-items: center; }
  .trust-items { flex-direction: column; align-items: center; gap: 1.25rem; }
}

/* ========== UTILITY ========== */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none !important; }
.mono { font-family: var(--font-mono); }

/* Gradient text utility */
.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Staggered animation for grid children */
.grid-4 > *:nth-child(1) { animation: fadeInUp 0.5s ease-out 0.05s both; }
.grid-4 > *:nth-child(2) { animation: fadeInUp 0.5s ease-out 0.1s both; }
.grid-4 > *:nth-child(3) { animation: fadeInUp 0.5s ease-out 0.15s both; }
.grid-4 > *:nth-child(4) { animation: fadeInUp 0.5s ease-out 0.2s both; }
.grid-4 > *:nth-child(5) { animation: fadeInUp 0.5s ease-out 0.25s both; }
.grid-4 > *:nth-child(6) { animation: fadeInUp 0.5s ease-out 0.3s both; }
.grid-4 > *:nth-child(7) { animation: fadeInUp 0.5s ease-out 0.35s both; }
.grid-4 > *:nth-child(8) { animation: fadeInUp 0.5s ease-out 0.4s both; }
.grid-4 > *:nth-child(9) { animation: fadeInUp 0.5s ease-out 0.45s both; }
.grid-4 > *:nth-child(10) { animation: fadeInUp 0.5s ease-out 0.5s both; }
.grid-4 > *:nth-child(11) { animation: fadeInUp 0.5s ease-out 0.55s both; }
.grid-4 > *:nth-child(12) { animation: fadeInUp 0.5s ease-out 0.6s both; }

.grid-3 > *:nth-child(1) { animation: fadeInUp 0.5s ease-out 0.05s both; }
.grid-3 > *:nth-child(2) { animation: fadeInUp 0.5s ease-out 0.1s both; }
.grid-3 > *:nth-child(3) { animation: fadeInUp 0.5s ease-out 0.15s both; }
.grid-3 > *:nth-child(4) { animation: fadeInUp 0.5s ease-out 0.2s both; }
.grid-3 > *:nth-child(5) { animation: fadeInUp 0.5s ease-out 0.25s both; }
.grid-3 > *:nth-child(6) { animation: fadeInUp 0.5s ease-out 0.3s both; }

/* Scrollbar styling */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); border-radius: 4px; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* Selection color */
::selection { background: var(--color-accent-bg); color: var(--color-accent); }

/* Focus-visible for accessibility */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Smooth page transition */
.page-content {
  animation: fadeIn 0.4s ease-out;
}